$FIBK
FIRST INTERSTATE BANCSYSTEM INC Stock $fibk

$fibk Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000086041313000003 Filed on March 01, 2013

Income Statement

Concept	2011 Q4	2010	2009 Q4
Revenue		$314.5M
YoY Change		-4.11%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.400M	$20.14M	$5.200M
YoY Change	-10.2%	-9.7%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$63.11M
YoY Change		-25.67%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$20.10M	$54.45M	$17.10M
YoY Change	25.63%	-32.63%
Income Tax	$6.800M	$17.09M	$5.600M
% Of Pretax Income	33.83%	31.39%	32.75%
Net Earnings	$13.30M	$37.36M	$11.50M
YoY Change	23.15%	-30.65%
Net Earnings / Revenue		11.88%
Basic Earnings Per Share		$0.85
Diluted Earnings Per Share	$310.7K	$0.85	$367.4K
COMMON SHARES
Basic Shares Outstanding		39.91M shares
Diluted Shares Outstanding		40.13M shares

Balance Sheet

Concept	2011 Q4	2010	2009 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.642B
YoY Change	0.88%
Cash & Equivalents	$472.4M		$623.5M
Short-Term Investments	$2.170B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$184.8M	$188.0M	$196.0M
YoY Change	-1.79%	-4.08%
Goodwill	$183.7M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$10.00M	$18.00M	$0.00
YoY Change	-44.44%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$7.326B	$7.501B	$7.138B
YoY Change	-2.34%	5.09%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$8.000M	$13.00M	$18.00M
YoY Change	-38.46%	-27.78%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$516.0M	$625.0M	$480.0M
YoY Change	-17.44%	30.21%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$42.00M	$13.00M	$18.00M
YoY Change	223.08%	-27.78%
LONG-TERM LIABILITIES
Long-Term Debt	$161.0M	$161.0M	$197.0M
YoY Change	0.0%	-18.27%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$161.0M	$161.0M	$197.0M
YoY Change	0.0%	-18.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$42.00M	$13.00M	$18.00M
Total Long-Term Liabilities	$161.0M	$161.0M	$197.0M
Total Liabilities	$6.555B	$6.764B	$6.563B
YoY Change	-3.1%	3.06%
SHAREHOLDERS EQUITY
Retained Earnings	$435.1M
YoY Change	5.3%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$771.0M	$737.0M	$574.4M
YoY Change
Total Liabilities & Shareholders Equity	$7.326B	$7.501B	$7.138B
YoY Change	-2.34%	5.09%

Cashflow Statement

Concept	2011 Q4	2010	2009 Q4
OPERATING ACTIVITIES
Net Income	$13.30M	$37.36M	$11.50M
YoY Change	23.15%	-30.65%
Depreciation, Depletion And Amortization	$4.400M	$20.14M	$5.200M
YoY Change	-10.2%	-9.7%
Cash From Operating Activities	$43.70M	$109.3M	-$10.50M
YoY Change	60.07%	33.51%
INVESTING ACTIVITIES
Capital Expenditures	-$2.100M	-$8.000M	$3.900M
YoY Change	950.0%	-69.7%
Acquisitions
YoY Change
Other Investing Activities	-$78.80M	-$379.5M	-$94.70M
YoY Change	20.49%	86.58%
Cash From Investing Activities	-$80.80M	-$387.5M	-$90.80M
YoY Change	23.17%	68.62%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$163.7M
YoY Change		-2393.37%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	5.400M	$340.4M	212.4M
YoY Change	-97.03%	-25.59%
NET CHANGE
Cash From Operating Activities	43.70M	$109.3M	-10.50M
Cash From Investing Activities	-80.80M	-$387.5M	-90.80M
Cash From Financing Activities	5.400M	$340.4M	212.4M
Net Change In Cash	-31.70M	$62.14M	111.1M
YoY Change	-122.11%	-79.92%
FREE CASH FLOW
Cash From Operating Activities	$43.70M	$109.3M	-$10.50M
Capital Expenditures	-$2.100M	-$8.000M	$3.900M
Free Cash Flow	$45.80M	$117.3M	-$14.40M
YoY Change	66.55%	8.34%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	42248000	USD
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	48208000	USD
CY2012	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-11700000	USD
CY2011	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-10353000	USD
CY2010	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6762000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	115589000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	106420000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	17537000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	19034000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	15991000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	20533000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1906000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1534000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2485000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	385000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	239000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	360000	USD
CY2012	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Advertising Costs.</font><font style="font-family:inherit;font-size:10pt;"> Advertising costs are expensed as incurred. Advertising expense was </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$3,555</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$3,048</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$3,200</font><font style="font-family:inherit;font-size:10pt;"> in </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2012</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2011</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2010</font><font style="font-family:inherit;font-size:10pt;">, respectively.</font></div></div>
CY2010	us-gaap	Advertising Expense AdvertisingExpense	3200000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	3555000	USD
CY2011	us-gaap	Advertising Expense AdvertisingExpense	3048000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2485000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1906000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1660000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	40750000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	66900000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	58151000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	8116000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	2889000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	5231000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	60936000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	52339000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	71281000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1420000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1446000	USD
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1748000	USD
CY2011	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	3225000	USD
CY2010	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	4615000	USD
CY2012	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	3501000	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6724000	USD
CY2010	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6724000	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	7464000	USD
CY2010	us-gaap	Asset Management Fees AssetManagementFees	12387000	USD
CY2011	us-gaap	Asset Management Fees AssetManagementFees	13575000	USD
CY2012	us-gaap	Asset Management Fees AssetManagementFees	14314000	USD
CY2012Q4	us-gaap	Assets Assets	7721761000	USD
CY2011Q4	us-gaap	Assets Assets	7325527000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	344317000	USD
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1966417000	USD
CY2011Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1983629000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	333521000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	333344000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	344180000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	177000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	137000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	1966417000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	438770000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	445319000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	133641000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	136444000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	351310000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	356641000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	1042696000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	1056854000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	0	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2016864000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1995258000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	1544000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	351000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	173000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	3000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	3000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	1690000	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	692000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	6000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	1000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	692000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	1690000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	686000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	1689000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	30531000	USD
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	33927000	USD
CY2011Q4	us-gaap	Capital Capital	800354000	USD
CY2012Q4	us-gaap	Capital Capital	748431000	USD
CY2011Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	387082000	USD
CY2012Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	384014000	USD
CY2011Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2012Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2011Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.165
CY2012Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.156
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	472447000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	801332000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	685618000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	623482000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	328885000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-213171000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	62136000	USD
CY2011Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	142502000	USD
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	177978000	USD
CY2012Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	801332000	USD
CY2011Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	472447000	USD
CY2011Q4	us-gaap	Common Stock Including Additional Paid In Capital CommonStockIncludingAdditionalPaidInCapital	266842000	USD
CY2012Q4	us-gaap	Common Stock Including Additional Paid In Capital CommonStockIncludingAdditionalPaidInCapital	271335000	USD
CY2012Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	1057000	USD
CY2011Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	5000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	54205000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	55181000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	31656000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18458000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	16451000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29866000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	19210000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	21276000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34347000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4481000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2818000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2759000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-15268000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7697000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2131000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-17257000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8762000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	274000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1989000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	38688000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	49515000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	51117000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2405000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	25815000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	22736000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	855000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	782000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	4418000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	4150000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	7659000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	42602000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1065000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9628000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2597000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	59143000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	53714000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	428000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	385000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	7041000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	919000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1399000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1052000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	921000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4711000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4284000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	-1546000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	-1499000	USD
CY2010	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-940000	USD
CY2011	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	135000	USD
CY2012	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-77000	USD
CY2011Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	1306509000	USD
CY2012Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	1811905000	USD
CY2012Q4	us-gaap	Deposits Deposits	6240411000	USD
CY2011Q4	us-gaap	Deposits Deposits	5826971000	USD
CY2011Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1691413000	USD
CY2012Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1547713000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17112000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20136000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17368000	USD
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19233000	USD
CY2010	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17905000	USD
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	26208000	USD
CY2010	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3422000	USD
CY2011	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3422000	USD
CY2012	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3300000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.28
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.27
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	635000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	950000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	728000	USD
CY2011	us-gaap	Equipment Expense EquipmentExpense	12562000	USD
CY2010	us-gaap	Equipment Expense EquipmentExpense	13434000	USD
CY2012	us-gaap	Equipment Expense EquipmentExpense	12859000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1238000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	225000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	124000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	273000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	124000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	273000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	225000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	10297000	USD
CY2010Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	42226000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	32838000	USD
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4087727000	USD
CY2010Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4168607000	USD
CY2010	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	10044000	USD
CY2011	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	7333000	USD
CY2012	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	6470000	USD
CY2011Q4	us-gaap	Federal Funds Sold FederalFundsSold	309000	USD
CY2012Q4	us-gaap	Federal Funds Sold FederalFundsSold	730000	USD
CY2012Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	6687000	USD
CY2011Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	6807000	USD
CY2012Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	13357000	USD
CY2011Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	13357000	USD
CY2011	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	17647000	USD
CY2010	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	18181000	USD
CY2012	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	17412000	USD
CY2011	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	31689000	USD
CY2010	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	29494000	USD
CY2012	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	34226000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	90214000	USD
CY2010Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	78254000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	79743000	USD
CY2011Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3955953000	USD
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	136185000	USD
CY2010Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	199302000	USD
CY2012	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	29606000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-672000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-28000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	424000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-428000	USD
CY2010	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-306000	USD
CY2010	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	708000	USD
CY2011	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	552000	USD
CY2012	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	1041000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	183673000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	183673000	USD
CY2011Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	230596000	USD
CY2011Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	94827000	USD
CY2012Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	76597000	USD
CY2011	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	1544000	USD
CY2010	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	170000	USD
CY2012	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	348000	USD
CY2011	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	14443000	USD
CY2010	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	15321000	USD
CY2011Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	152781000	USD
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	208223000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	8000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	189000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	29258000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	181000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	28701000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	557000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	86416000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	47437000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount	208223000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	69340000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Fair Value HeldToMaturitySecuritiesDebtMaturitiesFairValue	218933000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	4657000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	74656000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	90954000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	48293000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	4657000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	373000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	373000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	218933000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	161877000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	189000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	17000	USD
CY2012Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	10899000	USD
CY2011Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	9113000	USD
CY2010	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	156384000	USD
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	185281000	USD
CY2011	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	238175000	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	8463000	USD
CY2010	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	8824000	USD
CY2011	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	12358000	USD
CY2011	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	1659000	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	1631000	USD
CY2010Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	199302000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	136185000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	230596000	USD
CY2010Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	42226000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	10297000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	32838000	USD
CY2010Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	212877000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	158512000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	264801000	USD
CY2010Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	76672000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	82232000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	117004000	USD
CY2010Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	122630000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	53953000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	113592000	USD
CY2012	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	70	USD
CY2011	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	USD
CY2010	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	USD
CY2012	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	6724000	USD
CY2011	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	7464000	USD
CY2010	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	6724000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	88262000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	54446000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	66161000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17090000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21615000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30038000	USD
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	30038000	USD
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	17090000	USD
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	21615000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	23156000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19056000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	30892000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	76000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	65000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	120000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1619000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1972000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2524000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3578000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3661000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3498000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	17540000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	37325000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	16640000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	5913000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-4969000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3579000	USD
CY2012	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2012	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	6951000	USD
CY2011	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	10377000	USD
CY2010	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	18595000	USD
CY2012	us-gaap	Interest Income Domestic Deposits InterestIncomeDomesticDeposits	1235000	USD
CY2011	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1654000	USD
CY2010	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-3495000	USD
CY2012	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-3105000	USD
CY2010	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	101657000	USD
CY2011	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-98742000	USD
CY2012	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	413440000	USD
CY2012	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1621000	USD
CY2011	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-5055000	USD
CY2010	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-4407000	USD
CY2012	us-gaap	Increase Decrease In Mortgage Loans Held For Sale IncreaseDecreaseInMortgageLoansHeldForSale	-12122000	USD
CY2011	us-gaap	Increase Decrease In Mortgage Loans Held For Sale IncreaseDecreaseInMortgageLoansHeldForSale	-4466000	USD
CY2010	us-gaap	Increase Decrease In Mortgage Loans Held For Sale IncreaseDecreaseInMortgageLoansHeldForSale	-1121000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-8158000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4089000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-13039000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	126991	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	97670	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	219725	shares
CY2011	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	292883000	USD
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	273900000	USD
CY2010	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	314546000	USD
CY2011	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	245767000	USD
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	230882000	USD
CY2010	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	266472000	USD
CY2011Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	4555262000	USD
CY2012Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	4745102000	USD
CY2012Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	622624000	USD
CY2011Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	329636000	USD
CY2012	us-gaap	Interest Expense InterestExpense	30114000	USD
CY2011	us-gaap	Interest Expense InterestExpense	42031000	USD
CY2010	us-gaap	Interest Expense InterestExpense	63107000	USD
CY2012	us-gaap	Interest Expense Deposits InterestExpenseDeposits	22306000	USD
CY2010	us-gaap	Interest Expense Deposits InterestExpenseDeposits	53949000	USD
CY2011	us-gaap	Interest Expense Deposits InterestExpenseDeposits	33533000	USD
CY2012	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	5117000	USD
CY2010	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	5843000	USD
CY2011	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	5828000	USD
CY2012	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	1981000	USD
CY2010	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	2433000	USD
CY2011	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	1975000	USD
CY2010	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	879000	USD
CY2012	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	579000	USD
CY2011	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	695000	USD
CY2011	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2010	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	3000	USD
CY2011	us-gaap	Interest Income Domestic Deposits InterestIncomeDomesticDeposits	1050000	USD
CY2010	us-gaap	Interest Income Domestic Deposits InterestIncomeDomesticDeposits	1093000	USD
CY2011	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	192701000	USD
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	203036000	USD
CY2010	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	184539000	USD
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	251439000	USD
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	243786000	USD
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	250852000	USD
CY2011	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	13000	USD
CY2012	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	13000	USD
CY2010	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	22000	USD
CY2010	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4621000	USD
CY2011	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4749000	USD
CY2012	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4923000	USD
CY2012	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	36847000	USD
CY2011	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	41304000	USD
CY2010	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	42338000	USD
CY2011	us-gaap	Interest Paid InterestPaid	47086000	USD
CY2012	us-gaap	Interest Paid InterestPaid	31735000	USD
CY2010	us-gaap	Interest Paid InterestPaid	67514000	USD
CY2011Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	8123000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	6502000	USD
CY2012Q4	us-gaap	Interest Receivable InterestReceivable	28869000	USD
CY2011Q4	us-gaap	Interest Receivable InterestReceivable	31974000	USD
CY2012Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	82477000	USD
CY2011Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	123715000	USD
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	89833000	USD
CY2011	us-gaap	Labor And Related Expense LaborAndRelatedExpense	83560000	USD
CY2010	us-gaap	Labor And Related Expense LaborAndRelatedExpense	83373000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1960000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2030000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1423000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	6970575000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	6554507000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7721761000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7325527000	USD
CY2011Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	74880000	USD
CY2012Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	76729000	USD
CY2010	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1682000	USD
CY2011	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1824000	USD
CY2012	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1849000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	100511000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	112581000	USD
CY2009Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	103030000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	120480000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4223912000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4186549000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4073968000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4123401000	USD
CY2012Q4	us-gaap	Loans Held For Sale Mortgages LoansHeldForSaleMortgages	66442000	USD
CY2011Q4	us-gaap	Loans Held For Sale Mortgages LoansHeldForSaleMortgages	53521000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	37160000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	37200000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	36446000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	244000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	71000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	65000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	285000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	49000	USD
CY2011Q4	us-gaap	Marketable Securities MarketableSecurities	2169645000	USD
CY2012Q4	us-gaap	Marketable Securities MarketableSecurities	2203481000	USD
CY2010	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-787000	USD
CY2011	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	1275000	USD
CY2012	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-771000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-230333000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	334142000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	340389000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-141079000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-387511000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-125939000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	109258000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	143101000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	135822000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	37356000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	58224000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	44546000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	41124000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	54924000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33934000	USD
CY2011Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1271709000	USD
CY2012Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1495309000	USD
CY2012	us-gaap	Noninterest Expense NoninterestExpense	229635000	USD
CY2010	us-gaap	Noninterest Expense NoninterestExpense	221004000	USD
CY2011	us-gaap	Noninterest Expense NoninterestExpense	218412000	USD
CY2012	us-gaap	Noninterest Income NoninterestIncome	114861000	USD
CY2010	us-gaap	Noninterest Income NoninterestIncome	90911000	USD
CY2011	us-gaap	Noninterest Income NoninterestIncome	91872000	USD
CY2011	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6264000	USD
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6771000	USD
CY2010	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7811000	USD
CY2012	us-gaap	Occupancy Net OccupancyNet	15786000	USD
CY2011	us-gaap	Occupancy Net OccupancyNet	16223000	USD
CY2010	us-gaap	Occupancy Net OccupancyNet	16251000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	14716000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	3221000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	716000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1084000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2443000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3082000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	4170000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	68177000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	62953000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	16148000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-5017000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-8826000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3043000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5700000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9659000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5700000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3043000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	9659000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	77000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	940000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-135000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	47000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	607000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-81000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	-348000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	-1544000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	-170000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-211000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-110000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-924000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-137000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-60000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-620000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	6489000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-3126000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1974000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	17168000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4648000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-8438000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2819000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-5449000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	10269000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1829000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2989000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	6899000	USD
CY2012	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	29345000	USD
CY2010	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	29294000	USD
CY2011	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	27792000	USD
CY2012Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	37160000	USD
CY2011Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	37200000	USD
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	48922000	USD
CY2011	us-gaap	Other Noninterest Expense OtherNoninterestExpense	43735000	USD
CY2010	us-gaap	Other Noninterest Expense OtherNoninterestExpense	42640000	USD
CY2012Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	32000	USD
CY2011Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	7000	USD
CY2010	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	-2480000	USD
CY2011	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	-596000	USD
CY2012	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	-907000	USD
CY2012	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	128919000	USD
CY2010	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	-71762000	USD
CY2011	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	-90548000	USD
CY2011	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	9172000	USD
CY2010	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	7998000	USD
CY2012	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	14420000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	263000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	248000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3699000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	26208000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19233000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17905000	USD
CY2011	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3422000	USD
CY2010	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3422000	USD
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3300000	USD
CY2010	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	13597000	USD
CY2011	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2012	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1246068000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1317938000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1166364000	USD
CY2011	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2010	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	900000	USD
CY2010	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	33118000	USD
CY2012	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	68305000	USD
CY2011	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	18846000	USD
CY2012Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	1344220000	USD
CY2011Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	1310895000	USD
CY2012	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3300000	USD
CY2011	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3422000	USD
CY2010	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3422000	USD
CY2012Q4	us-gaap	Preferred Stock Including Additional Paid In Capital PreferredStockIncludingAdditionalPaidInCapital	0	USD
CY2011Q4	us-gaap	Preferred Stock Including Additional Paid In Capital PreferredStockIncludingAdditionalPaidInCapital	50000000	USD
CY2012Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue
CY2011Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	5000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	5000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	5000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	5000	shares
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1911000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	167400000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	385000	USD
CY2011	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-103911000	USD
CY2012	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-10458000	USD
CY2010	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	146013000	USD
CY2010	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	2889000	USD
CY2012	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	8116000	USD
CY2011	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	5231000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-4984000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	25000	USD
CY2010	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-432000	USD
CY2010	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	833910000	USD
CY2011	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	943490000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	1252266000	USD
CY2010	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	15134000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	12192000	USD
CY2011	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	12682000	USD
CY2011	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	15896000	USD
CY2012	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	42814000	USD
CY2010	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	20336000	USD
CY2011	us-gaap	Professional Fees ProfessionalFees	3676000	USD
CY2010	us-gaap	Professional Fees ProfessionalFees	3245000	USD
CY2012	us-gaap	Professional Fees ProfessionalFees	4044000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	291191000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	303154000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	187565000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	184771000	USD
CY2012	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	40750000	USD
CY2010	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	66900000	USD
CY2011	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	58151000	USD
CY2011Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	37452000	USD
CY2012Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	32571000	USD
CY2010Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	33632000	USD
CY2009Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	38400000	USD
CY2010	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	21314000	USD
CY2011	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	26644000	USD
CY2012	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	43541000	USD
CY2011	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	302000	USD
CY2012	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	40000	USD
CY2010	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	35851000	USD
CY2010	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2012	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	41238000	USD
CY2011	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	435144000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	463860000	USD
CY2012Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	505785000	USD
CY2011Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	516243000	USD
CY2012Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	12653000	USD
CY2011Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	11555000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	2111000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	1764000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	2485000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2756441	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	17.10
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	76963	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	27442	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	369766	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3373655	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3484928	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.26
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.60
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	11.38
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	16.75
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	14.42
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	14.33
CY2010Q1	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio StockholdersEquityNoteStockSplitConversionRatio	4	shares
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y2M23D
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y0M7D
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	376634	shares
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	205000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	153257000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	299000	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	649000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	216000	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1612000	USD
CY2012	us-gaap	Stock Redeemed Or Called During Period Value StockRedeemedOrCalledDuringPeriodValue	50000000	USD
CY2010	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	-3699000	USD
CY2011	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	248000	USD
CY2012	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	263000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	771020000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	751186000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	736802000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	574434000	USD
CY2011	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	204000	USD
CY2010	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	239000	USD
CY2012	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	360000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3691000	USD
CY2011Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	489000	USD
CY2011Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	704229000	USD
CY2012Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	652929000	USD
CY2011Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	286303000	USD
CY2012Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	296559000	USD
CY2011Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2012Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2011Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.098
CY2012Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.088
CY2011Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	704229000	USD
CY2012Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	652929000	USD
CY2011Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	193541000	USD
CY2012Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	192007000	USD
CY2011Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.040
CY2012Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.040
CY2011Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.146
CY2012Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.136
CY2012Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	3000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	67357000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	63412000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	999439000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	79030000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	176243000	USD
CY2012Q4	us-gaap	Time Deposits TimeDeposits	1385484000	USD
CY2012Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	594712000	USD
CY2011Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	681047000	USD
CY2011Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	876293000	USD
CY2012Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	790772000	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates.</font><font style="font-family:inherit;font-size:10pt;"> The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and income and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to change relate to the determination of the allowance for loan losses and the valuation of goodwill and other real estate owned.</font></div></div>
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40127365	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43092978	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	42847196	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39907640	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	42965987	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	42749526	shares
CY2012Q4	fibk	Available For Sale And Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions AvailableForSaleAndHeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	69000	securities
CY2011Q4	fibk	Available For Sale And Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions AvailableForSaleAndHeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	24000	securities
CY2012Q4	fibk	Available For Sale Securities Debt Maturities With Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCostBasis	1966417000	USD
CY2012Q4	fibk	Available For Sale Securities Debt Maturities With Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue	1995258000	USD
CY2012	fibk	Company Sponsored Wholly Owned Business Trusts Number CompanySponsoredWhollyOwnedBusinessTrustsNumber	7
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More After Year Five ContractualMaturitiesTimeDeposits100000OrMoreAfterYearFive	0	USD
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More Next Twelve Months ContractualMaturitiesTimeDeposits100000OrMoreNextTwelveMonths	437597000	USD
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More Year Five ContractualMaturitiesTimeDeposits100000OrMoreYearFive	23714000	USD
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More Year Four ContractualMaturitiesTimeDeposits100000OrMoreYearFour	27272000	USD
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More Year Three ContractualMaturitiesTimeDeposits100000OrMoreYearThree	33646000	USD
CY2012Q4	fibk	Contractual Maturities Time Deposits100000 Or More Year Two ContractualMaturitiesTimeDeposits100000OrMoreYearTwo	72483000	USD
CY2012Q4	fibk	Core Deposit Intangibles Net CoreDepositIntangiblesNet	5937000	USD
CY2011Q4	fibk	Core Deposit Intangibles Net CoreDepositIntangiblesNet	7357000	USD
CY2011Q4	fibk	Credit Extension Commitments CreditExtensionCommitments	1049796	USD
CY2012Q4	fibk	Credit Extension Commitments CreditExtensionCommitments	1144695	USD
CY2011Q4	fibk	Credit Extension Commitments Beyond One Year CreditExtensionCommitmentsBeyondOneYear	283861000	USD
CY2012Q4	fibk	Credit Extension Commitments Beyond One Year CreditExtensionCommitmentsBeyondOneYear	253130000	USD
CY2012	fibk	Deferred Compensation Arrangement With Individual Required Service Hours DeferredCompensationArrangementWithIndividualRequiredServiceHours	PT20H
CY2012Q4	fibk	Deferred Tax Assets Deferred Gain Sale Of Subsidiary DeferredTaxAssetsDeferredGainSaleOfSubsidiary	750000	USD
CY2011Q4	fibk	Deferred Tax Assets Deferred Gain Sale Of Subsidiary DeferredTaxAssetsDeferredGainSaleOfSubsidiary	1010000	USD
CY2011Q4	fibk	Deferred Tax Assets Other Real Estate Owned Write Downs And Carrying Costs DeferredTaxAssetsOtherRealEstateOwnedWriteDownsAndCarryingCosts	7444000	USD
CY2012Q4	fibk	Deferred Tax Assets Other Real Estate Owned Write Downs And Carrying Costs DeferredTaxAssetsOtherRealEstateOwnedWriteDownsAndCarryingCosts	6850000	USD
CY2012Q4	fibk	Deferred Tax Liabilities Agency Stock Dividends DeferredTaxLiabilitiesAgencyStockDividends	2060000	USD
CY2011Q4	fibk	Deferred Tax Liabilities Agency Stock Dividends DeferredTaxLiabilitiesAgencyStockDividends	2079000	USD
CY2012Q4	fibk	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities	11360000	USD
CY2011Q4	fibk	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities	13091000	USD
CY2012Q4	fibk	Federal Reserve Bank Unrestricted Cash Held Carrying Value FederalReserveBankUnrestrictedCashHeldCarryingValue	622152000	USD
CY2011Q4	fibk	Federal Reserve Bank Unrestricted Cash Held Carrying Value FederalReserveBankUnrestrictedCashHeldCarryingValue	329390000	USD
CY2012	fibk	Financing Receivable Modifications Number Of Contracts During Period FinancingReceivableModificationsNumberOfContractsDuringPeriod	38	notes
CY2011	fibk	Financing Receivable Modifications Number Of Contracts During Period FinancingReceivableModificationsNumberOfContractsDuringPeriod	137	notes
CY2012	fibk	Financing Receivable Modifications Pre Modification Recorded Investment Restructured During Period FinancingReceivableModificationsPreModificationRecordedInvestmentRestructuredDuringPeriod	22760000	USD
CY2011	fibk	Financing Receivable Modifications Pre Modification Recorded Investment Restructured During Period FinancingReceivableModificationsPreModificationRecordedInvestmentRestructuredDuringPeriod	85143000	USD
CY2012Q4	fibk	Financing Receivable Modifications Recorded Investment Accrual Method FinancingReceivableModificationsRecordedInvestmentAccrualMethod	31932000	USD
CY2011Q4	fibk	Financing Receivable Modifications Recorded Investment Accrual Method FinancingReceivableModificationsRecordedInvestmentAccrualMethod	37376000	USD
CY2012Q4	fibk	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	44665000	USD
CY2011Q4	fibk	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	57451000	USD
CY2012	fibk	Financing Receivable Modifications Subsequent Default Number Of Contracts During Period FinancingReceivableModificationsSubsequentDefaultNumberOfContractsDuringPeriod	3	notes
CY2011	fibk	Financing Receivable Modifications Subsequent Default Number Of Contracts During Period FinancingReceivableModificationsSubsequentDefaultNumberOfContractsDuringPeriod	20	notes
CY2011	fibk	Financing Receivable Modifications Subsequent Default Recorded Investment During Period FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentDuringPeriod	4322000	USD
CY2012	fibk	Financing Receivable Modifications Subsequent Default Recorded Investment During Period FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentDuringPeriod	1103000	USD
CY2011Q4	fibk	Financing Receivable Modifications Subsequent Default Recorded Investment During Period On Non Accrual Status FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentDuringPeriodOnNonAccrualStatus	18	notes
CY2012	fibk	Financing Receivable Recorded Investment Nonaccrual Status Interest Income If Accrued FinancingReceivableRecordedInvestmentNonaccrualStatusInterestIncomeIfAccrued	8537000	USD
CY2011	fibk	Financing Receivable Recorded Investment Nonaccrual Status Interest Income If Accrued FinancingReceivableRecordedInvestmentNonaccrualStatusInterestIncomeIfAccrued	12508000	USD
CY2010	fibk	Financing Receivable Recorded Investment Nonaccrual Status Interest Income If Accrued FinancingReceivableRecordedInvestmentNonaccrualStatusInterestIncomeIfAccrued	8942000	USD
CY2011	fibk	Gain Loss On Sale Of Mortgage Servicing GainLossOnSaleOfMortgageServicing	0	USD
CY2012	fibk	Gain Loss On Sale Of Mortgage Servicing GainLossOnSaleOfMortgageServicing	19000	USD
CY2010	fibk	Gain Loss On Sale Of Mortgage Servicing GainLossOnSaleOfMortgageServicing	-1525000	USD
CY2012Q4	fibk	Held To Maturity Securities Debt Maturities With Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithSingleMaturityDateFairValue	218560000	USD
CY2012Q4	fibk	Held To Maturity Securities Debt Maturities With Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithSingleMaturityDateNetCarryingAmount	207850000	USD
CY2012	fibk	Impairment Of Real Estate Change In Appraised Value ImpairmentOfRealEstateChangeInAppraisedValue	702000	USD
CY2011	fibk	Impairment Of Real Estate Change In Appraised Value ImpairmentOfRealEstateChangeInAppraisedValue	4197000	USD
CY2010	fibk	Impairment Of Real Estate Change In Appraised Value ImpairmentOfRealEstateChangeInAppraisedValue	2491000	USD
CY2012	fibk	Impairment Of Real Estate Change In Management Estimates ImpairmentOfRealEstateChangeInManagementEstimates	6022000	USD
CY2010	fibk	Impairment Of Real Estate Change In Management Estimates ImpairmentOfRealEstateChangeInManagementEstimates	4233000	USD
CY2011	fibk	Impairment Of Real Estate Change In Management Estimates ImpairmentOfRealEstateChangeInManagementEstimates	3267000	USD
CY2010	fibk	Income From Origination And Sale Of Loans IncomeFromOriginationAndSaleOfLoans	22868000	USD
CY2011	fibk	Income From Origination And Sale Of Loans IncomeFromOriginationAndSaleOfLoans	21153000	USD
CY2012	fibk	Income From Origination And Sale Of Loans IncomeFromOriginationAndSaleOfLoans	41790000	USD
CY2011	fibk	Interest Expense Preferred Stock Pending Redemption InterestExpensePreferredStockPendingRedemption	0	USD
CY2010	fibk	Interest Expense Preferred Stock Pending Redemption InterestExpensePreferredStockPendingRedemption	0	USD
CY2012	fibk	Interest Expense Preferred Stock Pending Redemption InterestExpensePreferredStockPendingRedemption	131000	USD
CY2012Q4	fibk	Loans And Leases Receivable Held For Investment LoansAndLeasesReceivableHeldForInvestment	4157470000	USD
CY2011Q4	fibk	Loans And Leases Receivable Held For Investment LoansAndLeasesReceivableHeldForInvestment	4133028000	USD
CY2012Q4	fibk	Loans And Leases Receivable Held For Investment Evaluated For Impairment LoansAndLeasesReceivableHeldForInvestmentEvaluatedForImpairment	4223912000	USD
CY2010Q4	fibk	Loans And Leases Receivable Held For Investment Evaluated For Impairment LoansAndLeasesReceivableHeldForInvestmentEvaluatedForImpairment	4367909000	USD
CY2011Q4	fibk	Loans And Leases Receivable Held For Investment Evaluated For Impairment LoansAndLeasesReceivableHeldForInvestmentEvaluatedForImpairment	4186549000	USD
CY2011	fibk	Net Gains On Sales Of Student Loan Portfolio NetGainsOnSalesOfStudentLoanPortfolio	0	USD
CY2012	fibk	Net Gains On Sales Of Student Loan Portfolio NetGainsOnSalesOfStudentLoanPortfolio	0	USD
CY2010	fibk	Net Gains On Sales Of Student Loan Portfolio NetGainsOnSalesOfStudentLoanPortfolio	374000	USD
CY2011	fibk	Nonvested Liability Awards Vesting NonvestedLiabilityAwardsVesting	204000	USD
CY2011	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentBeforeTax	389000	USD
CY2012	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentNetOfTax	34000	USD
CY2010	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentNetOfTax	466000	USD
CY2011	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentNetOfTax	233000	USD
CY2012	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Tax Expense Benefit OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumTaxExpenseBenefit	22000	USD
CY2010	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Tax Expense Benefit OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumTaxExpenseBenefit	256000	USD
CY2010	fibk	Nonvested Liability Awards Vesting NonvestedLiabilityAwardsVesting	59000	USD
CY2012	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentBeforeTax	56000	USD
CY2010	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumAdjustmentBeforeTax	722000	USD
CY2011	fibk	Other Comprehensive Income Loss Available For Sale Securities Transferred To Held To Maturity Unamortized Premium Tax Expense Benefit OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTransferredToHeldToMaturityUnamortizedPremiumTaxExpenseBenefit	156000	USD
CY2012	fibk	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentTax	-30000	USD
CY2010	fibk	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentTax	-333000	USD
CY2011	fibk	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentTax	54000	USD
CY2010	fibk	Other Comprehensive Income Loss Unamortized Premium On Available For Sale Securities Transferred To Held To Maturity OtherComprehensiveIncomeLossUnamortizedPremiumOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	722000	USD
CY2012	fibk	Other Comprehensive Income Loss Unamortized Premium On Available For Sale Securities Transferred To Held To Maturity OtherComprehensiveIncomeLossUnamortizedPremiumOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	56000	USD
CY2011	fibk	Other Comprehensive Income Loss Unamortized Premium On Available For Sale Securities Transferred To Held To Maturity OtherComprehensiveIncomeLossUnamortizedPremiumOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	389000	USD
CY2012	fibk	Other Real Estate Owned Expense Net Of Income OtherRealEstateOwnedExpenseNetOfIncome	9400000	USD
CY2010	fibk	Other Real Estate Owned Expense Net Of Income OtherRealEstateOwnedExpenseNetOfIncome	7670000	USD
CY2011	fibk	Other Real Estate Owned Expense Net Of Income OtherRealEstateOwnedExpenseNetOfIncome	8652000	USD
CY2012	fibk	Outsourced Technology Services OutsourcedTechnologyServices	8826000	USD
CY2011	fibk	Outsourced Technology Services OutsourcedTechnologyServices	8933000	USD
CY2010	fibk	Outsourced Technology Services OutsourcedTechnologyServices	9477000	USD
CY2011Q4	fibk	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Cost PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtCost	1280317000	USD
CY2012Q4	fibk	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Cost PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtCost	1318807000	USD
CY2011Q4	fibk	Preferred Stock Pending Redemption PreferredStockPendingRedemption	0	USD
CY2012Q4	fibk	Preferred Stock Pending Redemption PreferredStockPendingRedemption	50000000	USD
CY2012	fibk	Proceeds From Sale Of Student Loans Portfolio ProceedsFromSaleOfStudentLoansPortfolio	0	USD
CY2011	fibk	Proceeds From Sale Of Student Loans Portfolio ProceedsFromSaleOfStudentLoansPortfolio	0	USD
CY2010	fibk	Proceeds From Sale Of Student Loans Portfolio ProceedsFromSaleOfStudentLoansPortfolio	25032000	USD
CY2011	fibk	Real Estate Acquired Through Foreclosure Disposals RealEstateAcquiredThroughForeclosureDisposals	15374000	USD
CY2010	fibk	Real Estate Acquired Through Foreclosure Disposals RealEstateAcquiredThroughForeclosureDisposals	19598000	USD
CY2012	fibk	Real Estate Acquired Through Foreclosure Disposals RealEstateAcquiredThroughForeclosureDisposals	41773000	USD
CY2012	fibk	Real Estate Acquired Through Foreclosure Improvements RealEstateAcquiredThroughForeclosureImprovements	75000	USD
CY2011	fibk	Real Estate Acquired Through Foreclosure Improvements RealEstateAcquiredThroughForeclosureImprovements	14000	USD
CY2010	fibk	Real Estate Acquired Through Foreclosure Improvements RealEstateAcquiredThroughForeclosureImprovements	240000	USD
CY2010Q4	fibk	Recorded Receivable From Sale Of Mortgage Servicing Rights RecordedReceivableFromSaleOfMortgageServicingRights	1204000	USD
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Granted Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantedNumberOfShares	369766	shares
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantsInPeriodWeightedAverageGrantDateFairValue	4.06
CY2012Q4	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares	617214	shares
CY2011Q4	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares	588236	shares
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Forfeited Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares	27442	shares
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	4.12
CY2012Q4	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	4.20
CY2011Q4	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	3.71
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Vested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfShares	313346	shares
CY2012	fibk	Share Based Compensation Arrangement By Share Based Payment Award Options Vested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	3.13
CY2012Q4	fibk	Time Deposits Obtained Certificate Of Deposit Account Registry Service TimeDepositsObtainedCertificateOfDepositAccountRegistryService	72062000	USD
CY2011Q4	fibk	Time Deposits Obtained Certificate Of Deposit Account Registry Service TimeDepositsObtainedCertificateOfDepositAccountRegistryService	98331000	USD
CY2011	fibk	Transfer Of Accrued Liabilities To Common Stock TransferOfAccruedLiabilitiesToCommonStock	216000	USD
CY2010	fibk	Transfer Of Accrued Liabilities To Common Stock TransferOfAccruedLiabilitiesToCommonStock	59000	USD
CY2011	fibk	Transfer Of Portfolio Loans To Mortgage Servicing Assets TransferOfPortfolioLoansToMortgageServicingAssets	2864000	USD
CY2012	fibk	Transfer Of Portfolio Loans To Mortgage Servicing Assets TransferOfPortfolioLoansToMortgageServicingAssets	4563000	USD
CY2010	fibk	Transfer Of Portfolio Loans To Mortgage Servicing Assets TransferOfPortfolioLoansToMortgageServicingAssets	4222000	USD
CY2012	fibk	Transfer Of Preferred Stock Pending Redemption From Equity To Liability TransferOfPreferredStockPendingRedemptionFromEquityToLiability	50000000	USD
CY2012	fibk	Transfer Of Premises And Equipment Pending Disposal To Other Assets Book Value TransferOfPremisesAndEquipmentPendingDisposalToOtherAssetsBookValue	1000	USD
CY2010	fibk	Transfer Of Premises And Equipment Pending Disposal To Other Assets Book Value TransferOfPremisesAndEquipmentPendingDisposalToOtherAssetsBookValue	1513000	USD
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000860413
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	265747635	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	FIRST INTERSTATE BANCSYSTEM INC
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No

Files In Submission

Name	View Source	Status
0000860413-13-000003-index-headers.html	Edgar Link	pending
0000860413-13-000003-index.html	Edgar Link	pending
0000860413-13-000003.txt	Edgar Link	pending
0000860413-13-000003-xbrl.zip	Edgar Link	pending
fibk-20121231.xml	Edgar Link	completed
fibk-20121231.xsd	Edgar Link	pending
fibk-20121231x10k.htm	Edgar Link	pending
fibk-20121231xex211.htm	Edgar Link	pending
fibk-20121231xex231.htm	Edgar Link	pending
fibk-20121231xex311.htm	Edgar Link	pending
fibk-20121231xex312.htm	Edgar Link	pending
fibk-20121231_cal.xml	Edgar Link	unprocessable
fibk-20121231_def.xml	Edgar Link	unprocessable
fibk-20121231_lab.xml	Edgar Link	unprocessable
fibk-20121231_pre.xml	Edgar Link	unprocessable
fibk-20211231xex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
performgraph123112.jpg	Edgar Link	pending
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$FIBK
FIRST INTERSTATE BANCSYSTEM INC Stock $fibk

2011 Q4 Form 10-K Financial Statement

#000086041313000003 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FIBK FIRST INTERSTATE BANCSYSTEM INC Stock $fibk

2011 Q4 Form 10-K Financial Statement

#000086041313000003 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FIBK
FIRST INTERSTATE BANCSYSTEM INC Stock $fibk